Tata Docomo — 3G not working

Address:

Pune, Maharashtra

Hi,
I have taken a Tata Docomo Postpaid SIM with Rs.1299 Plan. According to the plan, I should get 2GB 3G data free and unlimited 2G data. I called up the customer support asking for the 3G Settings for my Apple iPhone 3GS. They asked me to send a message with 1299 typed to 52270. I got a reply saying that "My phone does not support automatic settings and I have to contact Customer Support for Manual settings". I called up the customer support again, asking for the manual settings. At first they asked me to enter APN as TATA.DOCOMO.INTERNETHVC. I tried using this APN, but neither the 3G data nor the 2G data was working. I called the customer support again telling them the error I was facing. They again asked me to change the APN to "internet HVC APN". I tried using this APN and I was getting the same error. I called up the customer support again telling them about the error. They asked me to choose Aircel Network and to try again. I tried with Aircel network and again I got the same error. I called them up again and now they say that its my phone's fault. So I tried using a Nokia phone. But still, I was unable to connect to 3G. When i informed the customer support again, they said that there is network problem in Pune, so might be because of that I am facing this issue. When i told them that before taking Postpaid SIM, I was using Tata Docomo 3G in prepaid SIM and it worked absolutely fine, they replied that they have done whatever they could do to help me and its my problem now.
These Tata Docomo people are themselves confused about the APN.
Please help!!

Thanks,
Ankit Goyal
Mobile: [protected](facing this problem)
Mail id : [protected]@yahoo.com